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Mental Addition Worksheet

Speed calculation lesson 5: Running totals · Set 138 · 40 questions
TalentJR

The fast method (Keep a running total): Start with the first number. Add the tens of the next number, then its ones. Keep going until the list ends — only one total in your head at a time.

NameDateTime takenScore ___ / 40
  1. 1.76 + 60 + 60 + 41 =
  2. 2.71 + 52 + 27 + 29 =
  3. 3.88 + 83 + 59 + 54 =
  4. 4.67 + 64 + 64 + 80 =
  5. 5.56 + 23 + 17 + 47 =
  6. 6.40 + 26 + 55 + 49 =
  7. 7.16 + 24 + 16 + 64 =
  8. 8.16 + 46 + 29 + 88 =
  9. 9.89 + 65 + 24 + 18 =
  10. 10.17 + 21 + 80 + 21 =
  11. 11.22 + 46 + 75 + 23 =
  12. 12.16 + 35 + 89 + 80 =
  13. 13.82 + 35 + 89 + 61 =
  14. 14.24 + 26 + 25 + 35 =
  15. 15.19 + 86 + 29 + 86 =
  16. 16.55 + 28 + 19 + 11 =
  17. 17.11 + 50 + 11 + 76 =
  18. 18.79 + 50 + 79 + 27 =
  19. 19.41 + 48 + 12 + 14 =
  20. 20.57 + 19 + 39 + 28 =
  21. 21.37 + 56 + 56 + 49 =
  22. 22.57 + 28 + 83 + 84 =
  23. 23.15 + 52 + 69 + 85 =
  24. 24.29 + 38 + 58 + 55 =
  25. 25.76 + 53 + 22 + 15 =
  26. 26.41 + 39 + 84 + 47 =
  27. 27.35 + 45 + 24 + 66 =
  28. 28.89 + 16 + 87 + 70 =
  29. 29.81 + 50 + 24 + 38 =
  30. 30.65 + 35 + 18 + 17 =
  31. 31.35 + 21 + 42 + 11 =
  32. 32.89 + 45 + 56 + 19 =
  33. 33.41 + 15 + 13 + 14 =
  34. 34.54 + 24 + 41 + 84 =
  35. 35.39 + 85 + 32 + 34 =
  36. 36.73 + 81 + 87 + 40 =
  37. 37.43 + 27 + 43 + 14 =
  38. 38.75 + 42 + 34 + 74 =
  39. 39.67 + 29 + 24 + 22 =
  40. 40.50 + 64 + 13 + 54 =

Answer key

  1. 237
  2. 179
  3. 284
  4. 275
  5. 143
  6. 170
  7. 120
  8. 179
  9. 196
  10. 139
  11. 166
  12. 220
  13. 267
  14. 110
  15. 220
  16. 113
  17. 148
  18. 235
  19. 115
  20. 143
  21. 198
  22. 252
  23. 221
  24. 180
  25. 166
  26. 211
  27. 170
  28. 262
  29. 193
  30. 135
  31. 109
  32. 209
  33. 83
  34. 203
  35. 190
  36. 281
  37. 127
  38. 225
  39. 142
  40. 181

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